{
  "url": "https://dantelabs.com/traits/secondary-hyperparathyroidism",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "secondary-hyperparathyroidism",
    "id": "HP:0000867",
    "name": "Secondary hyperparathyroidism",
    "definition": "Secondary hyperparathyroidism refers to the production of higher than normal levels of parathyroid hormone in the presence of hypocalcemia.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-endocrine-system",
        "name": "Abnormality of the endocrine system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-endocrine-system"
      }
    ],
    "broader": [
      {
        "slug": "hyperparathyroidism",
        "name": "Elevated blood parathyroid hormone level",
        "url": "https://dantelabs.com/traits/hyperparathyroidism"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "cyp27b1",
        "symbol": "CYP27B1",
        "hgnc": "HGNC:2606",
        "name": "cytochrome P450 family 27 subfamily B member 1",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/cyp27b1"
      },
      {
        "slug": "cyp2r1",
        "symbol": "CYP2R1",
        "hgnc": "HGNC:20580",
        "name": "cytochrome P450 family 2 subfamily R member 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cyp2r1"
      },
      {
        "slug": "ca2",
        "symbol": "CA2",
        "hgnc": "HGNC:1373",
        "name": "carbonic anhydrase 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ca2"
      },
      {
        "slug": "phex",
        "symbol": "PHEX",
        "hgnc": "HGNC:8918",
        "name": "phosphate regulating endopeptidase X-linked",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/phex"
      },
      {
        "slug": "vdr",
        "symbol": "VDR",
        "hgnc": "HGNC:12679",
        "name": "vitamin D receptor",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/vdr"
      }
    ]
  }
}